After completing update a browser Flock is installed in my system

Can you give the output of:

lsb_release -a; uname -a; apt-cache policy flock*

Thanks

thanks for replying,the output is

swagatak@MOON:~$ lsb_release -a; uname -a; apt-cache policy flock*
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 10.10
Release: 10.10
Codename: maverick
Linux MOON 2.6.35-28-generic #49-Ubuntu SMP Tue Mar 1 14:40:58 UTC 2011 i686 GNU/Linux
libfile-flock-perl:
  Installed: (none)
  Candidate: 2008.01-0ubuntu1
  Version table:
     2008.01-0ubuntu1 0
        500 http://archive.ubuntu.com/ubuntu/ maverick/universe i386 Packages
flock:
  Installed: 2.6.1-1~getdeb1
  Candidate: 2.6.1-1~getdeb1
  Version table:
 *** 2.6.1-1~getdeb1 0
        500 http://archive.getdeb.net/ubuntu/ maverick-getdeb/apps i386 Packages
        100 /var/lib/dpkg/status
swagatak@MOON:~$

Ok well you have added the getdeb ppa, flock seems to have either been installed by a user (in the admin group) or is a strange dependency of a package (which I strongly doubt).

You can uninstall it if you desire.

Thanks a lot once again , sir .

I also doubt that dependency of a package has installed this. I have installed firefox 4 by your suggested way . Now if I uninstall it from ubuntu software centre ,can it cause any damage to my system . How can I know which is dependent on this. I want to inform that I have installed mozilla thunderbrid mail, and some theme packges. I dont like flock ,I like the default browser Firefox. I want to uninstall it without harming my system. Please give me advice.........

thanks

Thanks actionparsnip

I have successfully removed Flock.

Thanks actionparsnip, that solved my question.